Fight or flight is a response to which kind of stimulus A. The external stimulus of heat
B. The internal stimulus of hunger
C. The external stimulus of danger
D. The internal stimulus of illness
I NEED ASAP

What advantages does a pedigree have over a written passage?

Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.

Which is an innovation of gymnosperms? gymnosperms are the first seed plants. gymnosperms are the first flowering plants. gymnosperms are the first vascular plants. gymnosperms are the first spore plants.